Fisher Tropsch Process

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Transcript Fisher Tropsch Process

Constandinos Mitsingas
Overall Process
Syngas Production
Fischer Tropsch Process
Fischer Tropsch Reactors
Chemical Reaction Catalysts
Current Research Areas
60-70% of total cost
Natural gas has 20% CO2, more efficient and
cost effective
Coal, has 50% CO2, more abundant
Input Materials
◦ Coal
◦ Natural Gas
◦ Biomass
Process Chemistry:
Formation of methane is unwanted
2𝑛 + 1 𝐻2 + 𝑛𝐶𝑂 → 𝐶𝑛 𝐻(2𝑛+2) + 𝑛𝐻2 𝑂
a. Slurry bubble column reactor; b. Multitubular trickle bed reactor; c. Circulating fluidized bed
reactor; d. Fluidized bed reactor.
Two Most favored reactor types:
◦ Multitubular fixed bed reactor with internal cooling
◦ Slurry bubble column reactor with internal cooling tubes
Transition Metal
◦ Cobalt
 Highly active
 Feedstock is natural gas
◦ Iron
 Suitable for low-hydrogen-content synthesis gases
 Lower quality feedstock, coal or biomass
◦ Ruthenium
 Very Expensive
 Hardly used in FT
◦ Nickel
 Favors methane formation
Table 1: Conventions of produced fuel
names and compositions
Table 2: Comparison of FT Diesel with two ASTM
approved Diesels
No Nitrogenous compounds
No Sulfur compounds
Cetane rating (energy stored) 75-90% higher
than that required for petrochemical derived
diesel fuel
Heat removal from the process
Syngas Clean-Up
Catalyst deactivation rate
Change in feedstock
Table 3:Estimate of patents of the major companies active in FischerTropsch
"Fischer–Tropsch Process." Wikipedia, the Free Encyclopedia.
Web. 29 Nov. 2010. <–
Boerrigter, H., and A. Van Der Drift. "LARGE-SCALE
(2004). ECN. Web.
"Alternative Fuels and Advanced Vehicles Data Center: What Is
Fischer-Tropsch Diesel?" EERE: Alternative Fuels and
Advanced Vehicles Data Center Program Home Page. Web. 29
Nov. 2010.